Why convert several JPG into PNG in Java?

Converting a group of JPG to a single PNG allows you to handle materials more effectively.

What output file formats can I use to merge JPG files?

We support a variety of output file formats for JPG merging, including PDF, DOCX, DOC, HTML, RTF, Markdown, XML, ODT, JPG, PNG, TIFF, TXT and many more.

What is the maximum JPG size supported by Aspose.Words for Java?

There are no size limits to merge JPG files using Aspose.Words for Java.

Several JPG Into PNG Java

Q: How to convert several JPG into PNG?

Open the site: JPG into PNG . Drag and drop JPG files to quickly convert them into PNG. Or just use a code sample in Java with a few lines of code. Install Aspose.Words for Java. Add a library reference (import the library) to your Java project. Open the source JPG file in Java. Convert several JPG files into PNG in a few seconds. Call the appendDocument() method, passing an output filename with PNG extension. Get the result of conversion JPG into PNG.

Convert JPG to PNG in Java

Modern Java library allows Java developers to convert JPG to PNG image format with a few lines of code. JPG image conversion engine analyses the original graphical content, and exports the combined picture to PNG format.

Use Java to convert JPG to PNG image format with maximum flexibility and speed. Run online live demo and check the highest PNG image quality right in a browser. JPG Conversion API supports a bunch of useful options.

Merge JPG to PNG in Java

To convert several JPG to PNG just use Java library that handles all low-level details.

Convert multiple JPG images and save the result as a single PNG image. If you develop code in Java, image format conversion will be simpler than it sounds. See Java example that iterates through image files and combines them into PNG:

Code example in Java to combine multiple JPG to PNG

Input files

Upload a file you want to merge

Run code

Upload a file you want to merge

Output format

Select the target format from the list

// Repository path: https://releases.aspose.com/java/repo/
// Maven, where 'ver' - Aspose.Words version number, for example, 24.4.
<dependency>
  <groupId>com.aspose</groupId>
  <artifactId>aspose-words</artifactId>
  <version>ver</version>
  <classifier>jdk17</classifier>
</dependency>

Copy

// Repository path: https://releases.aspose.com/java/repo/
// Gradle, where 'ver' - Aspose.Words version number, for example, 24.4.
compile(group: 'com.aspose', name: 'aspose-words', version: 'ver', classifier: 'jdk17')

Copy

// Repository path: https://releases.aspose.com/java/repo/
// Ivy, where 'ver' - Aspose.Words version number, for example, 24.4.
<dependency org="com.aspose" name="aspose-words" rev="ver">
 <artifact name="aspose-words" m:classifier="jdk17" ext="jar"/>
</dependency>

Copy

// Repository path: https://releases.aspose.com/java/repo/
// Sbt, where 'ver' - Aspose.Words version number, for example, 24.4.
libraryDependencies += "com.aspose" % "aspose-words" % "ver"

Copy

import com.aspose.words.*;

List<String> fileNames = Arrays.asList("Input1.jpg", "Input2.jpg");

Document doc = new Document();
DocumentBuilder builder = new DocumentBuilder(doc);

List<Shape> shapes = fileNames.stream().map(fileName -> {
    try {
        return builder.insertImage(fileName);
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}).collect(Collectors.toList());

// Calculate the maximum width and height and update page settings 
// to crop the document to fit the size of the pictures.
PageSetup pageSetup = builder.getPageSetup();
pageSetup.setPageWidth(shapes.stream().mapToDouble(shape -> shape.getWidth()).max().getAsDouble());
pageSetup.setPageHeight(shapes.stream().mapToDouble(shape -> shape.getHeight()).sum());
pageSetup.setTopMargin(0);
pageSetup.setLeftMargin(0);
pageSetup.setBottomMargin(0);
pageSetup.setRightMargin(0);

doc.save("Output.png");

            

					Run code
				

You may freely copy this code and use it in any applicable purpose

How to convert several JPG into PNG

Install Aspose.Words for Java.
Add a library reference (import the library) to your Java project.
Open the source JPG file in Java.
Convert several JPG files into PNG in a few seconds.
Call the appendDocument() method, passing an output filename with PNG extension.
Get the result of conversion JPG into PNG.

Java library to convert several JPG into PNG

We host our Java packages in Maven repositories. 'Aspose.Words for Java' is a common JAR file containing byte-code. Please follow the step-by-step instructions on how to install it to your Java developer environment.

System Requirements

Java SE 7 and more recent Java versions are supported. We also provide a separate package for Java SE 6 in case you are obliged to use this outdated JRE.

Our Java package is cross-platform and runs on all operating systems with JVM implementation, including Microsoft Windows, Linux, macOS, Android and iOS.

For information on optional package dependencies, such as JogAmp JOGL, Harfbuzz font engine, Java Advanced Imaging JAI, please refer to Product Documentation.

You can merge JPG to many other file formats: